CN102916777B - Radio communication base station device and CQI method of reseptance - Google Patents

Radio communication base station device and CQI method of reseptance Download PDF

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Publication number
CN102916777B
CN102916777B CN201210408581.3A CN201210408581A CN102916777B CN 102916777 B CN102916777 B CN 102916777B CN 201210408581 A CN201210408581 A CN 201210408581A CN 102916777 B CN102916777 B CN 102916777B
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group
cqi
base station
radio communication
unit
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CN102916777A (en
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户田隆
西尾昭彦
今村大地
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Godo Kaisha IP Bridge 1
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
    • H04L1/0035—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter evaluation of received explicit signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H04L5/0039—Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The radio communication base station device of the present invention, the multiple subcarriers constituting multi-carrier signal are divided into multiple groups, and each group to the plurality of group, reporting channel quality identifier, this radio communication base station device includes: scheduling unit, carries out distributing to the data mailing to mobile station apparatus the frequency scheduling of subcarrier; Described data and pattern information are sent to described mobile station apparatus by transmitting element; And reception unit, from described mobile station apparatus, according to described pattern information, receive CQI that report in discrete time resource respectively, each group of all the plurality of group cycle sequences according to regulation.

Description

Radio communication base station device and CQI method of reseptance
The divisional application of application for a patent for invention that the application is the applying date, and to be on August 18th, 2006, application number be 200680030111.0, denomination of invention is " radio communication mobile station device, radio communication base station device and CQI report method ".
Technical field
The present invention relates to radio communication mobile station device, radio communication base station device and CQI method.
Background technology
In recent years, in mobile communications, it is more than voice, even the various information of image and data etc. also become the object of transmission. Necessity for high reliability and transmission at a high speed also further increases therewith. But, when carrying out high-speed transfer in mobile communications, it is impossible to ignoring the impact postponing ripple caused by multipath, transmission characteristic can worsen because of frequency selective fading.
One of countermeasure technology as frequency selective fading, gets most of the attention with the multi-carrier communication that OFDM (OrthogonalFrequencyDivisionMultiplexing: OFDM) mode is representative. Multi-carrier communication be the multiple subcarriers in a kind of scope utilizing transmission speed to be suppressed in not occurrence frequency Selective intensity to transmit data, thus carrying out the technology of high-speed transfer. Particularly because the frequency being configured multiple subcarriers of data is mutually orthogonal, in multi-carrier communication be also in an ofdm fashion efficiency of frequency employment the highest and also by fairly simple hardware configuration and attainable. Therefore, the communication means that OFDM mode adopts as the mobile communication system of cellular fashion gets most of the attention, and by various researchs in addition.
Study the OFDM mode that is suitable in downgoing line, carry out the technology (for example, referring to non-patent literature 1) of frequency scheduling. In this frequency scheduling, radio communication base station device (hereinafter referred to as base station) is based on the quality of reception of each frequency band at radio communication mobile station device (hereinafter referred to as mobile platform), each is moved platform assigning sub-carriers adaptively, therefore, it is possible to obtain multi-user diversity gain to greatest extent, it is possible to communicate expeditiously very much. Such frequency scheduling is, is primarily suitable for the mode of data communication when mobile platform low speed moves.
Therefore, in order to carry out frequency scheduling, each moves platform needs the receiving quality report of each subcarrier or each Resource Block summarizing multiple subcarrier to base station.It is said that in general, the report of the quality of reception is undertaken by CQI (ChannelQualityIndicator: CQI).
Here, if mobile platform reports the CQI of all subcarriers, then the uplink resource for the transmission of CQI becomes huge, and therefore the data transmission capacity of uplink can reduce. Then, multiple subcarriers are divided into multiple groups (sub carrier groups), each moves platform and only reports the CQI of relevant any one sub carrier groups distributing to this TV station, and the technology thus cutting down the transmission quantity of CQI is suggested (with reference to non-patent literature 2). It addition, in the following description, by sub carrier groups referred to as SC group.
[non-patent literature 1] R1-050604 " DownlinkChannelizationandMultiplexingforEUTRA " 3GPPTSGRANWG1AdHoconLTE, SophiaAntipolis, France, 20-21June, 2005
[non-patent literature 2] R1-050590 " PhysicalchannelsandmultiplexinginEvolvedUTRAdownlink " 3GPPTSGRANWG1AdHoconLTE, SophiaAntipolis, France, 20-21June, 2005
Summary of the invention
Invent problem to be solved
But, in the technology that non-patent literature 2 is recorded, the quality of reception of the SC group being assigned with is relatively low, and static or low speed moves and the less mobile platform of the variation of propagation path state, priority in frequency scheduling is always relatively low, therefore the probability being assigned with the good subcarrier of the quality of reception is very low, its result, can cause that handling capacity reduces.
And, if the subcarrier being assigned to the SC group of this priority relatively low mobile is assigned to mobile that other priority is higher, then cannot be carried out distributing based on the subcarrier of CQI to relatively low mobile of this priority, therefore this handling capacity moving platform can reduce further.
It is an object of the invention to provide the radio communication mobile station device of the handling capacity can improved in multi-carrier communication, radio communication base station device and CQI method.
For solving the means of problem
The multiple subcarriers constituting multi-carrier signal are divided into multiple groups by mobile of the present invention, and for each group of the plurality of group, the radio communication mobile station device of the CQI of report subcarrier, its structure adopted includes: control unit, carries out the control making the group of CQI object periodically change in the plurality of group; Generate unit, according to described control, generate the CQI of each subcarrier of any one group belonging to the plurality of group; And transmitting element, send the CQI generated.
The radio communication base station device of the present invention, the multiple subcarriers constituting multi-carrier signal are divided into multiple groups, and each group to the plurality of group, report CQI, this radio communication base station device includes: scheduling unit, carries out distributing to the data mailing to mobile station apparatus the frequency scheduling of subcarrier; Described data and pattern information are sent to described mobile station apparatus by transmitting element; And reception unit, from described mobile station apparatus, according to described pattern information, receiving CQI that sequentially report in discrete time resource respectively, each group of all the plurality of group according to the period 1, the quantity of the described discrete time resource comprised in the second round of the CQI duplicate reports of a group in the plurality of group is identical with the quantity of the plurality of group.
The CQI method of reseptance of the present invention, for the multiple subcarriers constituting multi-carrier signal are divided into multiple groups, and each group to the plurality of group, report CQI, this CQI method of reseptance comprises the following steps: the step carrying out that the data mailing to mobile station apparatus are distributed to the frequency scheduling of subcarrier;Described data and pattern information are sent to the step of described mobile station apparatus; And from described mobile station apparatus, according to described pattern information, receiving step that sequentially report in discrete time resource respectively, CQI each group of all of the plurality of group according to the period 1, the quantity of the described discrete time resource comprised in the second round of the CQI duplicate reports of a group in the plurality of group is identical with the quantity of the plurality of group.
The effect of invention
In accordance with the invention it is possible to the handling capacity improved in multi-carrier communication.
Accompanying drawing explanation
Fig. 1 indicates that the block diagram of the structure of mobile of an embodiment of the invention.
Fig. 2 indicates that the block diagram of the structure of the base station of an embodiment of the invention.
Fig. 3 represents the reference table of an embodiment of the invention.
Fig. 4 represents the example of the SC group of an embodiment of the invention.
Fig. 5 represents the example of the Report mode of an embodiment of the invention.
Fig. 6 represents that the CQI of an embodiment of the invention generates timing and CQI receives timing.
Detailed description of the invention
Hereinafter, embodiment for the present invention, it is described in detail with reference to accompanying drawing.
(embodiment)
Fig. 1 represents the structure of mobile of present embodiment. And, Fig. 2 represents the structure of the base station of present embodiment. The multiple subcarriers constituting multi-carrier signal are divided into multiple SC group by mobile 100 shown in Fig. 1, and for each group of these multiple SC groups, the CQI of report subcarrier. And, the base station 200 shown in Fig. 2 carries out frequency scheduling based on the CQI from the multiple mobile platform report adopting the structure shown in Fig. 1.
In mobile 100 shown in Fig. 1, radio receiving unit 102 is by antenna 101, receiving the OFDM symbol of the multi-carrier signal sent from the base station 200 shown in Fig. 2, the reception that this OFDM symbol carries out down coversion, A/D conversion etc. processes, and exports GI removal unit 103.
GI removal unit 103 removes the GI (GuardInterval: protection interval) being attached to OFDM symbol, and exports FFT (FastFourierTransform: fast fourier transform) unit 104.
The OFDM symbol inputted from GI removal unit 103 is carried out FFT by FFT unit 104, transforms to frequency domain, thus obtaining pilot frequency code element, pattern information and data symbols. Pilot frequency code element is imported into SINR and detects unit 108, and pattern information and data symbols are imported into demodulating unit 105. This pattern information represents the Report mode of the CQI of multiple SC group.
Pattern information and data symbols are demodulated by demodulating unit 105, and the pattern information after demodulation and data symbols are decoded by decoding unit 106. Thus obtain receiving data. And, decoded pattern information is imported into group control unit 107.
Group control unit 107, according to pattern information, carries out the control (control of SC group) making the SC group of CQI object periodically change in multiple SC groups. Such as, group control unit 107, to each frame or each TTI (TransmissionTimeInterval: Transmission Time Interval), makes the SC group of CQI object change. In this SC group controls, the SC group of CQI object, to each frame or each TTI, is indicated to SINR and detects unit 108 and CQI generation unit 109 by group control unit 107. It addition, details that SC group control be will be discussed hereafter.
SINR detects unit 108 according to the instruction from group control unit 107, utilize pilot frequency code element detection to belong to the SINR (SignaltoInterferenceandNoiseRatio: Signal to Interference plus Noise Ratio) of each subcarrier of SC group of CQI object, and it can be used as the quality of reception of each subcarrier to export CQI generation unit 109.
CQI generates unit 109 and has a table as shown in Figure 3, and according to the instruction from group control unit 107, generates corresponding for the SINR CQI with each subcarrier of the SC group belonging to CQI object with reference to this table. In other words, CQI generates unit 109 and controls according to SC group, generates the CQI of each subcarrier of any one the SC group belonging to multiple SC group. Such as, for the subcarrier that SINR is B��SINR < A, generate CQI:5. It addition, the MCS of CQI:5 and 16QAM and R=3/4 (ModulationandCodingScheme: modulation coding mode) is corresponding. And, in CQI:5, every frame can send the data of 9000 bits. It is to say, the transfer rate of CQI:5 is 9000 [bit/frame]. And, it is maximum value about the threshold value A��E, A of the SINR shown in this table, E is minimum value. It is to say, in a table as shown in figure 3, the more high CQI rank of the quality of reception is more high. And, CQI rank more high transfer rate is more high. The CQI so generated is encoded at coding unit 110, is modulated at modulating unit 111, and is imported into Multiplexing Unit 114.
On the other hand, send data and be encoded at coding unit 112, being modulated at modulating unit 113, thus becoming data symbols, and being imported into Multiplexing Unit 114.
The CQI inputted from modulating unit 111 is carried out time division multiplex with the data symbols inputted from modulating unit 113 by Multiplexing Unit 114, and exports wireless transmission unit 115. It addition, each frame or each TTI are carried out by the multiplexing of CQI. And, the multiplexing of CQI can also be frequency division multiplexing.
The wireless transmission unit 115 transmission signal to comprising CQI and data symbols, the transmission carrying out D/A conversion, amplification and up-conversion etc. processes, and is sent to the base station 200 shown in Fig. 2 by antenna 101.
On the other hand, in the base station 200 shown in Fig. 2, coding unit 201 is made up of coding unit 201-1��201-n. And, coding unit 201-1��201-n is provided n, the maximum mobile number of units that n can communicate equal to base station 200. Coding unit 201-1��201-n, to be corrected, by CQI, the encoding rate that unit 216 indicates, is encoded mailing to each transmission data moving platform (MS) #1��#n, and exports modulating unit 202.
Modulating unit 202 is made up of modulating unit 202-1��202-n. And, modulating unit 202-1��202-n is provided n, the maximum mobile number of units that n can communicate equal to base station 200. The coding data inputted from coding unit 201, to be corrected, by CQI, the modulation system that unit 216 indicates, are modulated by modulating unit 202-1��202-n, thus generating data symbols, and export scheduling unit 203.
Scheduling unit 203 is based on the CQI after correcting, from CQI, the correction that unit 216 inputs, by the dispatching method of MaxCIR method or proportional fairness (ProportionalFairness) etc., carry out to mail to each data symbols moving platform and distribute to adaptively the frequency scheduling of subcarrier. The data symbols having carried out frequency scheduling is imported into Multiplexing Unit 206.
And, pattern information is encoded at coding unit 204, is modulated at modulating unit 205, and is imported into Multiplexing Unit 206.
Multiplexing Unit 206 carries out time division multiplex by pilot frequency code element and from modulating unit 205 pattern information inputted and the data symbols inputted from scheduling unit 203, and exports IFFT (InverseFastFourierTransform: fast Flourier inverse transformation) unit 207.Thus, pilot frequency code element, pattern information or data symbols are assigned to each subcarrier. It addition, each frame or each TTI are carried out by the multiplexing of pilot frequency code element. And, the multiplexing of pattern information carries out when each communication moving platform starts. And, the multiplexing of pattern information can also be frequency division multiplexing.
Multiple subcarriers that pilot frequency code element, pattern information or data symbols are assigned are carried out IFFT and transform to time domain by IFFT unit 207, thus generating the OFDM symbol as multi-carrier signal. This OFDM symbol is imported into GI extra cell 208.
GI extra cell 208, by the signal identical with the tail portion of OFDM symbol, is attached to the beginning of OFDM symbol, and exports wireless transmission unit 209 as GI.
The transmission that GI OFDM symbol after additional is carried out D/A conversion, amplification and up-conversion etc. by wireless transmission unit 209 processes, and is sent to mobile 100 shown in Fig. 1 by antenna 210.
On the other hand, radio receiving unit 211 receives, by antenna 210, the signal sending from multiple mobile platforms 200 and comprising CQI, and the reception that this reception signal carries out down coversion, A/D conversion etc. processes. Signal after reception process is imported into separative element 212.
The signal of platform is moved from each, by frequency division multiplexing, time division multiplex, code division multiplexing or other multiplex mode is re-used and is received, therefore the Signal separator inputted from radio receiving unit 211 is moved platform (MS) #1��#n to each by separative element 212, and exports demodulating unit 213-1��213-n.
Demodulating unit 213-1��213-n, decoding unit 214-1��214-n and CQI extraction unit 215-1��215-n is provided n, the maximum mobile number of units that n can communicate equal to base station 200.
The signal inputted from separative element 212 is demodulated by demodulating unit 213-1��213-n, and exports decoding unit 214-1��214-n.
Signal from demodulating unit 213-1��213-n input is decoded by decoding unit 214-1��214-n, and exports CQI extraction unit 215-1��215-n.
CQI extraction unit 215-1��215-n extracts CQI from decoding unit 214-1��214-n signal inputted, and exports CQI correction unit 216. And, CQI extraction unit 215-1��215-n exports the signal after CQI extracts, and namely each moves the reception data of platform (MS) #1��#n.
CQI corrects unit 216 and has table as shown in Figure 3, according to the process of time, the CQI moving platform report from each is corrected. The details of this CQI correction be will be discussed hereafter. Then, CQI corrects unit 216 according to the Self Adaptive Control carrying out MCS of the CQI after correction, and encoding rate and modulation system are indicated to coding unit 201 and modulating unit 202, the CQI after correction is exported scheduling unit 203 simultaneously.
It follows that the details that the SC group of mobile platform 100 controls is described.
Such as, when an OFDM symbol is constituted with subcarrier f1��f16, in the present embodiment, as illustrated in fig. 4 subcarrier f1��f16 is divided into four SC groups. In other words, using subcarrier f4, f8, f12 and f16 as SC group #1, using subcarrier f3, f7, f11 and f15 as SC group #2, using subcarrier f2, f6, f10 and f14 as SC group #3, using subcarrier f1, f5, f9 and f13 as SC group #4. Then, representing that the pattern information of the Report mode of these four SC groups is notified to mobile platform 100 from base station 200, the group control unit 107 Report mode according to this pattern information carries out SC group and controls.
Fig. 5 represents the example of the Report mode of relevant SC group #1��#4. It addition, for the group (MS group) of each mobile platform, pattern information is notified to each and moves platform. Here, SC group is four, therefore corresponding, makes MS group also be four. In base station 200, each that will be located in communication zone moves platform and is categorized as one of them of this four MS groups.
In Figure 5, it is conceived to the Report mode of MS group #1: at frame #1, the CQI of each subcarrier belonging to SC group #1 is reported; At frame #2, the CQI of each subcarrier belonging to SC group #3 is reported; At frame #3, the CQI of each subcarrier belonging to SC group #2 is reported; At frame #4, the CQI of each subcarrier belonging to SC group #4 is reported; At frame #5, the CQI of each subcarrier belonging to SC group #1 is reported again. Like this, in the present embodiment, the SC group making CQI object periodically changes. Thus, mobile platform 100 will not reporting level is low always CQI, therefore handling capacity can be improved.
And, in the present embodiment, group control unit 107 carries out making all equal SC group control of report cycle of SC group #1��#4. In the example of the Report mode shown in Fig. 5, the report cycle making each SC group is all every four frames. Therefore, the report cycle by making each SC group is all equal like this, the CQI of each SC group is reported equably, at the time point that have passed through a cycle (being four frames here), base station 200 can utilize the CQI of all of subcarrier to carry out frequency scheduling, even if so have that the quality of reception is higher and priority is higher mobile when, also be able to carry out the frequency scheduling based on CQI to relatively low mobile of priority such that it is able to improve handling capacity further.
And, in Figure 5, the four of MS group #1��#4 Report modes being compared, Report mode is different. Such as, at the CQI of mobile the report SC group #4 of CQI, the MS group #4 of mobile the report SC group #2 of CQI, the MS group #3 of mobile the report SC group #3 of CQI, the MS group #2 of mobile the report SC group #1 of frame #1, MS group #1. Like this, each group control unit 107 moving platform makes the SC group of CQI object change according to the mutually different Report mode of Report mode of mobile with other. Thus, multiple mobile platform will not be occurred to report the situation of CQI of identical subcarrier simultaneously. Therefore, the subcarrier that the quality of reception is good will not be identical between the mobile station such that it is able to carries out the frequency scheduling in base station 200 expeditiously.
And, in all of Report mode in Figure 5, the SC group of CQI object with SC group #1, SC group #3, SC group #2, SC group #4, SC group #1 ... order repeat change. Here, being conceived to the packet shown in Fig. 4, SC group #1 and SC organizes between #3, and SC group #2 and SC organizes between #4, is absent from subcarrier adjacent to each other. It is to say, in the present embodiment, group control unit 107 by multiple SC groups, do not comprise two SC groups of subcarrier adjacent to each other sequentially as report objects. Such as, it is assumed that when SC group number is M, Report mode is set to SC group #1, SC group # (M/2+1), SC group #2, SC group # (M/2+2) ..., SC group # (M/2) and SC group #M. Thus, even frequency selectivity is relatively loose, and mobile that between close subcarrier, the difference of the quality of reception is less without the relatively low CQI of continuous reporting level, thus improving handling capacity.
It follows that the details of the CQI correction of base station 200 is described. Here, illustrate for the Report mode for MS group #1. Therefore, from the CQI pattern of mobile platform (MS) as shown in Figure 6.
Here, if existence decline variation, more long in the generation moment of mobile platform 100 and the interval between the use moment of base station 200, the reliability of CQI more reduces. Then, in order to compensate the reduction of this reliability, the CQI of base station 200 corrects the unit 216 process according to the time, and the CQI from mobile platform 100 report is corrected.
Specifically, such as, as shown in Figure 6, base station (BS) 200 is at frame #3, it is possible to be used in frame #1 be generated, at the CQI of the frame #2 SC group #1 received, and be generated at frame #2, at the CQI of the frame #3 SC group #3 received. Now, about the CQI of SC group #1, from the time of reception (frame #2) through being equivalent to the time of a frame, therefore, CQI correction unit 216 carries out reducing the rank of this CQI the correction of.
And, at frame #5, base station (BS) is although 200 can use all of CQI of SC group #1��#4, but CQI corrects unit 216 and similarly carries out following correction: will reduce by one from the time of reception (frame #4) through the rank of the CQI of the SC group #2 of a frame; Two will be reduced through the rank of the CQI of the SC group #3 of two frames from the time of reception (frame #3); Three will be reduced through the rank of the CQI of the SC group #1 of three frames from the time of reception (frame #2).
Like this, CQI corrects the unit 216 CQI to the elapsed time length between the time of reception and use moment, more increases correcting value. With reference to the table of Fig. 3, by reducing a CQI rank, transfer rate reduces a grade, therefore, it is possible to make error rate characteristic improve a grade therewith. Therefore, by carrying out such correction, it is possible to the reliability of the CQI compensating the process with the time reduces.
It addition, it practice, sometimes the quality of reception rise because of decline variation, in the present embodiment, for positively anti-transmission errors, carry out reducing CQI rank and making the less correction of transfer rate. It is to say, in the present embodiment, CQI corrects unit 216 and the CQI reported from mobile platform 100 is corrected to the CQI corresponding with less transfer rate.
Alternatively, it is also possible to according to sending data class switches whether carry out CQI correction. Such as, packets of voice etc. is postponed to require stricter transmission data, carry out above-mentioned CQI correction in order to avoid transmission error as far as possible; And e-mail data etc. is postponed to require looser transmission data, above-mentioned CQI correction is not carried out in order to improve transfer rate as far as possible.
And, although in above-mentioned CQI correction, often through a frame, just CQI rank is reduced a rank, but can also by rank corresponding for the time fluctuation speed of low for the CQI grade drops propagation path be equivalent to and caused by decline. In other words, CQI corrects unit 216 can also to decline variation faster, and mobile namely that translational speed is the fast CQI reported more increases correcting value. Thus, speed based on propagation path variation, more correct CQI correction can be carried out such that it is able to further anti-transmission errors.
So, according to present embodiment, it is possible to improve the handling capacity in multi-carrier communication, error rate characteristic can be improved and anti-transmission errors simultaneously.
It is explained above embodiments of the present invention.
It addition, mobile platform is sometimes referred to as UE, base station is sometimes referred to as NodeB, and subcarrier is sometimes referred to as tone (tone).
And, in the above-described embodiment, although describe the situation carrying out frequency scheduling in units of subcarrier, but carry out frequency scheduling with resource block unit it is also possible that. And, Resource Block is sometimes referred to as sub-channel, subcarrier block, subband or chunk (chunk). And, Resource Block is made up of continuous print subcarrier sometimes, is also sometimes made up of discrete subcarrier.
And, although in the above-described embodiment, carry out the generation of CQI based on SINR, but can also based on SNR, SIR, CINR, reception power, jamming power, the bit error rate, handling capacity, the MCS (ModulationandCodingScheme: modulation coding mode) etc. of the error rate of regulation can be met replace SINR and generate CQI. It is to say, in the present invention, it is also possible to the generation of CQI is carried out based on some parameter above-mentioned representing the quality of reception. And, although in the above-described embodiment, utilize pilot frequency code element to carry out the detection of the quality of reception, but the signal (such as, data symbols) beyond pilot frequency code element can also be utilized to detect the quality of reception.
And, although in the above-described embodiment, each frame has been carried out the report of CQI, but the interval to each regulation, such as every three frames are carried out the report of CQI it is also possible that.
Furthermore, it is also possible to SINR etc. to be carried out the conversion of dct transform etc., and the value after conversion is reported as CQI.
And, although in the above-described embodiment, it is made up of each SC group discrete subcarrier, but each SC group can also be made up of continuous print subcarrier.
And, although in each above-mentioned embodiment, the situation being constituted the present invention with hardware illustrates as an example, but the present invention also is able to implemented in software.
It addition, the LSI that each functional device being used in the explanation of above-mentioned embodiment is normally used as integrated circuit realizes. These blocks both can be integrated into a chip individually, it is also possible to part or all is integrated into a chip. Although being referred to herein as LSI, but the difference according to degree of integration, it is possible to it is referred to as IC, system LSI, super large LSI (SuperLSI), especially big LSI (UltraLSI).
Moreover, it is achieved that the method for integrated circuit is not limited only to LSI, it is possible to use special circuit or general processor realize. Programmable FPGA (FieldProgrammableGateArray: field programmable gate array) after LSI manufactures or the reconfigurable processor of the connection of the circuit unit within restructural LSI and setting can also be used in.
Furthermore, along with the technological progress of quasiconductor or the appearance of other technology derived from therewith, if there is the technology of the integrated circuit substituting LSI, this technology certainly available carries out the integrated of functional device. There is also the probability being suitable for biotechnology etc.
The radio communication mobile station device of the present invention, the multiple subcarriers constituting multi-carrier signal are divided into multiple groups, and for each group of the plurality of group, the CQI of report subcarrier, this radio communication mobile station device includes: control unit, carries out the control making the group of CQI object periodically change in the plurality of group; Generate unit, according to described control, generate the CQI of each subcarrier of any one group belonging to the plurality of group; And transmitting element, send the CQI generated.
In above-mentioned radio communication mobile station device, each frame or each TTI are made the group of CQI object change by described control unit.
In above-mentioned radio communication mobile station device, described control unit also makes respective report cycle of the plurality of group all equal.
In above-mentioned radio communication mobile station device, described control unit, always according to Report mode mutually different with the Report mode in other radio communication mobile station device, makes the group of CQI object change.
In above-mentioned radio communication mobile station device, described control unit also by the plurality of group, do not comprise two groups of subcarrier adjacent to each other sequentially as report objects.
The radio communication base station device of the present invention, by report CQI, the multiple subcarriers constituting multi-carrier signal are divided into multiple groups by described CQI, and the CQI of each group of subcarrier reported for the plurality of group, this radio communication base station device includes: correction unit, process according to the time, is corrected the CQI reported; And scheduling unit, carry out frequency scheduling based on the CQI after correction.
In above-mentioned radio communication base station device, described correction unit also to the time of reception and the CQI using elapsed time length between the moment, more increases correcting value.
In above-mentioned radio communication base station device, the CQI reported also is corrected into the CQI corresponding with less transfer rate by described correction unit.
In above-mentioned radio communication base station device, the CQI that the radio communication mobile station device that translational speed is fast is also reported by described correction unit, more increase correcting value.
The CQI method of the present invention, for the multiple subcarriers constituting multi-carrier signal are divided into multiple groups, and for each group of the plurality of group, the CQI of report subcarrier, this CQI method makes in the plurality of group, the group of CQI object periodically changes.
This specification is based on the Japanese patent application the 2005-238953rd applied on August 19th, 2005. Its content is all incorporated herein.
Industrial applicibility
The present invention can be applicable to mobile communication system etc.

Claims (6)

1. the multiple subcarriers constituting multi-carrier signal are divided into multiple groups by radio communication base station device, and each group to the plurality of group, reporting channel quality identifier, and this radio communication base station device includes:
Scheduling unit, carries out distributing to the data mailing to mobile station apparatus the frequency scheduling of subcarrier;
Described data and pattern information are sent to described mobile station apparatus by transmitting element; And
Receive unit, from described mobile station apparatus, according to described pattern information, receive CQI that sequentially report according to the period 1 in discrete time resource respectively, each group of all the plurality of group,
The quantity of the described discrete time resource comprised in the second round of the CQI duplicate reports of a group in the plurality of group is identical with the quantity of the plurality of group.
2. the radio communication base station device described in claim 1,
Make group change in units of every frame or every Transmission Time Interval of CQI report object.
3. radio communication base station device as claimed in claim 1,
The plurality of group of respective report cycle is all equal.
4. radio communication base station device as claimed in claim 1,
According to pattern information mutually different with the pattern information in other mobile station apparatus, report described CQI.
5. radio communication base station device as claimed in claim 1,
Sequentially it is reported in the plurality of group not comprise the CQIs of two groups of subcarrier adjacent to each other.
6. CQI method of reseptance, for the multiple subcarriers constituting multi-carrier signal are divided into multiple groups, and each group to the plurality of group, reporting channel quality identifier, this CQI method of reseptance comprises the following steps:
Carry out distributing to the data mailing to mobile station apparatus the step of the frequency scheduling of subcarrier;
Described data and pattern information are sent to the step of described mobile station apparatus; And
From described mobile station apparatus, according to described pattern information, receive step that sequentially report in discrete time resource respectively, CQI each group of all of the plurality of group according to the period 1,
The quantity of the described discrete time resource comprised in the second round of the CQI duplicate reports of a group in the plurality of group is identical with the quantity of the plurality of group.
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